Some of these ten are hard to but others look like quick wins. Perhaps Retweet.com’s biggest challenge may be the legacy Retweet.com inherits from Hummingbird via its parent company Mesiab Labs. There’s a good deal of trust in play when you add a third party widget to your site. Mesiab will have to earn it.

Update: I wrote that trust might be retweet.com's biggest challenge. Turns out that I (and many others) were right. The company was caught copying code straight from Tweetmeme. It seems likely that many bloggers would not want to be involved in that. The hill for retweet.com just got significantly steeper.

Update 2: Retweet.com has blogged their side of the Tweetmeme/retweet.com code drama. It's worth a read if you want to follow both sides of this development.